<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-alert
        title="添加商品信息 "
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- active接受的是数值 因为接受的是字符串 所以-0 可以转化为数值 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数 "></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          :tab-position="'left'"
          v-model="activeIndex"
          :before-leave="tabsTaggle"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="cascaderCaseId">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                expandTrigger="hover"
                :props="CateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyCateParams"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyCateParams"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"> </el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- 不是通过axios发送请求 所以没有token值 -->
            <el-upload
              :action="uploadURl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerToken"
              :on-success="handelSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"> </quill-editor>
            <el-button type="primary" class="btn" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <el-dialog
      title="图片预览"
      :visible.sync="previewDialogVisible"
      width="50%"
    >
      <img :src="previewPath" alt="" width="100%" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex: '0',
      addForm: {
        goods_name: '',
        goods_price: null,
        goods_weight: null,
        goods_number: null,
        goods_cat: [],
        pics: [],
        goods_introduce: '',
        attrs:[]
      },
      addFormRules: {
        goods_name: {
          required: true,
          message: '请输入商品名称',
          trigger: 'blur'
        },
        goods_price: {
          required: true,
          message: '请输入商品价格',
          trigger: 'blur'
        },
        goods_weight: {
          required: true,
          message: '请输入商品重量',
          trigger: 'blur'
        },
        goods_number: {
          required: true,
          message: '请输入商品数量',
          trigger: 'blur'
        },
        goods_cat: {
          required: true,
          message: '请输入分类名称',
          trigger: 'blur'
        }
      },
      cateList: [],
      CateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      manyCateParams: [],
      onlyCateParams: [],
      uploadURl: 'http://127.0.0.1:8888/api/private/v1/upload',
      headerToken: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewPath: '',
      previewDialogVisible: false,
      
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        this.$message.error('获取商品分类失败')
      }
      this.cateList = res.data
    },
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
        return
      }
    },
    tabsTaggle(activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请选择商品分类')
        return false
      }
    },
    async tabClicked() {
      //   console.log(this.activeIndex);
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: 'many'
            }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取参数失败')
        }
        this.$message.success('获取参数成功')
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyCateParams = res.data

        // console.log(this.manyCateParams);
      }
      if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: 'only'
            }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取参数失败')
        }
        this.$message.success('获取参数成功')
        this.onlyCateParams = res.data
      }
    },
    handlePreview(file) {
      // console.log(file);
      this.previewPath = file.response.data.url
      this.previewDialogVisible = true
    },
    handleRemove(file) {
      // console.log(file);
      const filePath = file.response.data.tmp_path
      const index = this.addForm.pics.findIndex(val => val === filePath)
      this.addForm.pics.splice(index, 1)
      // console.log(this.addForm.pics);
    },
    handelSuccess(response) {
      // console.log(response);
      const picInfo = {
        pic: response.data.tmp_path
      }
      this.addForm.pics.push(picInfo)
      console.log(this.addForm.pics)
    },
    add(){
      
      this.$refs.addFormRef.validate(async valid=>{
        if(!valid){
          return this.$message.error('请填写合法的商品信息')
        }
        // 通过lodash包进行深拷贝 拷贝出一份一摸一样的addform 修改为字符串  因为级联选择器要求 id项必须为数组
        const form = _.cloneDeep(this.addForm)
        form.goods_cat=form.goods_cat.join(',')
      //  console.log(this.addForm);
      // console.log(form);
      this.manyCateParams.forEach(item=>{
        const newInfo={
          attr_id:item.attr_id,
          attr_value:item.attr_vals.join(' ')
        }
        this.addForm.attrs.push(newInfo)
      })
      this.onlyCateParams.forEach(item=>{
        const newInfo={
          attr_id:item.attr_id,
          attr_value:item.attr_vals
        }
         this.addForm.attrs.push(newInfo)
      })
      form.attrs=this.addForm.attrs
      // console.log(form);
      const{data:res}=await this.$http.post('goods',form)
      if(res.meta.status!==201){
        return this.$message.error('添加商品失败')
      }
      this.$message.success('添加商品成功')
      this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-steps {
  margin: 20px 0;
  margin-left: 200px;
}

.btn{
  margin-top: 15px;
}
</style>
